Google translation----------------------------
hi
I have been studying theoretically a type Stirling engine (in fact, humid air), which could be effective for the exploitation of very small temperature gradients.
It is a modification of Peter Tailer engine, patented in 1986.
The result is a spreadsheet in Excel and simulation Modellus X. With them, you can simulate the operation of the machine.
The work is written using a syntax that Google Translate translates into intelligible form (Spanish to English). At least I hope so.
The address is: